From aa82f406b4d4ff21041ef39547d1b166e9c6ee38 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 23 Oct 2014 10:10:10 +0200 Subject: [PATCH 07/19] qemu-img: Avoid duplicate block device IDs Message-id: <1414059011-15516-8-git-send-email-kwolf@redhat.com> Patchwork-id: 61842 O-Subject: [RHEL-7.1 qemu-kvm PATCH v2 7/8] qemu-img: Avoid duplicate block device IDs Bugzilla: 1088176 RH-Acked-by: Jeffrey Cody RH-Acked-by: Markus Armbruster RH-Acked-by: Max Reitz qemu-img used to use "image" as ID for all block devices. This means that e.g. img_convert() ended up with potentially multiple source images and one target image, all with the same ID. The next patch will catch this and fail to open the block device. This patch makes sure that qemu-img uses meaningful unique IDs for the block devices it uses. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake (cherry picked from commit 9ffe333276de8ef463896303fb951f03fd4ffcb4) Signed-off-by: Kevin Wolf Signed-off-by: Miroslav Rezanina --- qemu-img.c | 38 ++++++++++++++++++++++---------------- 1 file changed, 22 insertions(+), 16 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 5c2f36a..fe0ac65 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -262,7 +262,8 @@ static int print_block_option_help(const char *filename, const char *fmt) return 0; } -static BlockDriverState *bdrv_new_open(const char *filename, +static BlockDriverState *bdrv_new_open(const char *id, + const char *filename, const char *fmt, int flags, bool require_io, @@ -274,7 +275,7 @@ static BlockDriverState *bdrv_new_open(const char *filename, Error *local_err = NULL; int ret; - bs = bdrv_new("image", &error_abort); + bs = bdrv_new(id, &error_abort); if (fmt) { drv = bdrv_find_format(fmt); @@ -616,7 +617,7 @@ static int img_check(int argc, char **argv) return 1; } - bs = bdrv_new_open(filename, fmt, flags, true, quiet); + bs = bdrv_new_open("image", filename, fmt, flags, true, quiet); if (!bs) { return 1; } @@ -725,7 +726,7 @@ static int img_commit(int argc, char **argv) return -1; } - bs = bdrv_new_open(filename, fmt, flags, true, quiet); + bs = bdrv_new_open("image", filename, fmt, flags, true, quiet); if (!bs) { return 1; } @@ -968,14 +969,14 @@ static int img_compare(int argc, char **argv) /* Initialize before goto out */ qemu_progress_init(progress, 2.0); - bs1 = bdrv_new_open(filename1, fmt1, BDRV_O_FLAGS, true, quiet); + bs1 = bdrv_new_open("image 1", filename1, fmt1, BDRV_O_FLAGS, true, quiet); if (!bs1) { error_report("Can't open file %s", filename1); ret = 2; goto out3; } - bs2 = bdrv_new_open(filename2, fmt2, BDRV_O_FLAGS, true, quiet); + bs2 = bdrv_new_open("image 2", filename2, fmt2, BDRV_O_FLAGS, true, quiet); if (!bs2) { error_report("Can't open file %s", filename2); ret = 2; @@ -1280,8 +1281,11 @@ static int img_convert(int argc, char **argv) total_sectors = 0; for (bs_i = 0; bs_i < bs_n; bs_i++) { - bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true, - quiet); + char *id = bs_n > 1 ? g_strdup_printf("source %d", bs_i) + : g_strdup("source"); + bs[bs_i] = bdrv_new_open(id, argv[optind + bs_i], fmt, BDRV_O_FLAGS, + true, quiet); + g_free(id); if (!bs[bs_i]) { error_report("Could not open '%s'", argv[optind + bs_i]); ret = -1; @@ -1395,7 +1399,7 @@ static int img_convert(int argc, char **argv) return -1; } - out_bs = bdrv_new_open(out_filename, out_fmt, flags, true, quiet); + out_bs = bdrv_new_open("target", out_filename, out_fmt, flags, true, quiet); if (!out_bs) { ret = -1; goto out; @@ -1758,8 +1762,8 @@ static ImageInfoList *collect_image_info_list(const char *filename, } g_hash_table_insert(filenames, (gpointer)filename, NULL); - bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, - false, false); + bs = bdrv_new_open("image", filename, fmt, + BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); if (!bs) { goto err; } @@ -2018,7 +2022,7 @@ static int img_map(int argc, char **argv) return 1; } - bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS, true, false); + bs = bdrv_new_open("image", filename, fmt, BDRV_O_FLAGS, true, false); if (!bs) { return 1; } @@ -2137,7 +2141,7 @@ static int img_snapshot(int argc, char **argv) filename = argv[optind++]; /* Open the image */ - bs = bdrv_new_open(filename, NULL, bdrv_oflags, true, quiet); + bs = bdrv_new_open("image", filename, NULL, bdrv_oflags, true, quiet); if (!bs) { return 1; } @@ -2264,7 +2268,7 @@ static int img_rebase(int argc, char **argv) * Ignore the old backing file for unsafe rebase in case we want to correct * the reference to a renamed or moved backing file. */ - bs = bdrv_new_open(filename, fmt, flags, true, quiet); + bs = bdrv_new_open("image", filename, fmt, flags, true, quiet); if (!bs) { return 1; } @@ -2561,7 +2565,8 @@ static int img_resize(int argc, char **argv) n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); qemu_opts_del(param); - bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet); + bs = bdrv_new_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, + true, quiet); if (!bs) { ret = -1; goto out; @@ -2662,7 +2667,8 @@ static int img_amend(int argc, char **argv) help(); } - bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet); + bs = bdrv_new_open("image", filename, fmt, + BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet); if (!bs) { error_report("Could not open image '%s'", filename); ret = -1; -- 1.8.3.1